Anticounterfeit, laser-markable label produced by diffraction gratings

US6723259B1 · kind B1 · utility

Assignee

• tesa AG · DE

Inventors

• Detlef Groth · Ferch, DE
• Arne Koops · Mölln, DE
• Axel Burmeister · Hamburg, DE
• Jochen Stähr · Hannover, DE

Key dates

• Filing date: Feb 2, 2000
• Grant date: Apr 20, 2004
• Expiry date: Feb 2, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H2250/10
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Process for producing an anticounterfeit label having a holographic image, and labels produced according to the process.